title: The presence of a porphyropsin-based visual pigment in the juvenile lemon shark (Negaprion brevirostris).
abstract: The visual pigment from the juvenile lemon shark has been extracted and is a homogeneous vitamin A2-based porphyropsin with maximum absorption at 522 nm. This is the first report of a porphyropsin visual pigment extracted from the retina of an elasmobranch. In contrast, the visual pigment from the adult lemon shark yields a homogeneous vitamin A1-based rhodopsin with maximum absorption at 501 nm. We conclude that the porphyropsin of the juvenile lemon shark changes over to a rhodopsin as the animal matures.
authors.affiliation: Department of Anatomy, School of Medicine, Wright State University, Dayton, OH 45435.
authors.forename: J L
authors.initials: JL
authors.lastname: Cohen
authors.forename: R E
authors.initials: RE
authors.lastname: Hueter
authors.forename: D T
authors.initials: DT
authors.lastname: Organisciak
mesh_terms: D000375:Aging / Q000378:metabolism; D000818:Animals; D012160:Retina / Q000737:chemistry*; D012168:Retinal Pigments / Q000032:analysis*; D012243:Rhodopsin / Q000032:analysis; D012754:Sharks / Q000378:metabolism*; D013053:Spectrophotometry
chemical_list: D012168:Retinal Pigments; C010507:porphyropsin; D012243:Rhodopsin